Denny Marco

Enterprise system for security officers, assignments, attendance, and SAP integration.

• Took over as technical lead; maintain and extend a legacy .NET Core 3.1 codebase.
• Migrated the backend to .NET 10 and the frontend from Vue 2 to Vue 3; replaced legacy libraries; refactored for safety and performance.
• Improved logging and observability; integrated AWS Secrets Manager, CloudWatch, SES, and S3.
• Built the GitLab CI pipeline: tests, SonarQube, security scan, regression tests, Docker images for frontend and backend, deployment.
• Wrote CI scripts in Bash, PowerShell, Python, and C#.
• Used AI tooling to build a simulator of third-party systems for testing integrations in the dev environment.
• Deploy to client and production environments.

• Role: Technical lead
• Stack: .NET 10, EF Core, MySQL, Quartz, Vue, AWS, GitLab CI
• Tests: TUnit, Testcontainers

Web platform for capturing and validating ID-card photos, as a self-service kiosk and a staff portal. The browser guides framing, head pose, and lighting, and releases the shutter only within tolerance. The server re-checks the full-resolution image, makes the final pass or fail decision, and stores per-rule evidence.

• Face comparison with AWS Rekognition; LLM checks for rules that classical computer vision cannot solve.

• Role: Technical lead
• Stack: .NET 11, EF Core, PostgreSQL, Vue 3, Vite+, Tailwind, Reka UI, TanStack Query, FastAPI, OpenCV, MediaPipe, AWS S3, AWS Rekognition, AWS Bedrock, GitLab CI
• Tests: TUnit, Testcontainers, Vitest, Playwright, pytest

Prototype that verifies security passes: OCR, layout and logo authenticity checks, and face matching against a live headshot. Multi-tenant design (client, assignment, site) with per-site validation rules.

• Fully agentic development with Claude Code and Codex.
• Python FastAPI service with PaddleOCR and OpenCV: document boundary detection, perspective alignment, region placement scoring, ROI-local OCR.
• Vue 3 admin dashboard: template upload, auto-suggested regions, drag-and-resize ROI editor, scanner with burst capture and best-frame selection.
• Planned .NET 10 orchestration layer, CompreFace face matching, AWS ECS Fargate deployment.

• Stack: Python, FastAPI, PaddleOCR, OpenCV, Vue 3, .NET 10, CompreFace, AWS ECS Fargate
• Tests: pytest

Portals for a Singapore government food safety agency. Laboratories, inspection bodies, and auditors apply for recognition; officers review, approve, and issue certificates.

• Built backend features in a clean-architecture .NET 8 solution with separate Internet and Intranet APIs: applications, renewals, withdrawals, and reports.
• Integrated Singpass and Corppass login; generated letters and certificates from Word templates.
• Split background services for documents, email, and Hangfire jobs, with Redis distributed locks.

• Role: Backend developer
• Stack: .NET 8, EF Core, Azure SQL, Azure Service Bus, Azure Blob Storage, Azure Key Vault, Hangfire, Redis
• Tests: xUnit, NSubstitute, AutoFixture

The first MOBA esports game from Indonesia.

• Designed and built backend microservices in .NET C# (95%) and Python.
• Event-driven with RabbitMQ; MySQL, MongoDB, and Redis; Redis caching.
• Frontend-to-third-party integration (Firebase, Sign in with Apple, Google Play Games) and frontend-to-backend integration.
• Docker and Kubernetes; Elasticsearch and Kibana logging; Prometheus and Grafana monitoring.
• CI/CD with TeamCity; cloud on Huawei, AWS, and Alibaba.
• Containerized game servers in Kubernetes with Agones.

• Stack: .NET, C#, Python, RabbitMQ, MySQL, MongoDB, Redis, Docker, Kubernetes, Agones, Elasticsearch, Kibana, Prometheus, Grafana, TeamCity

Kids’ shooter game for Xbox Kinect and Unity. Aim by moving a hand; shoot by clenching a fist. Gameplay, UI, Kinect SDK integration.

• Stack: Unity, Xbox Kinect SDK

Thesis project built with Unity.

• Stack: Unity
• Source: github.com/ky0jr/CarGo

Four unpublished Unity projects: R&D, gameplay, UI, FSM-based AI, Kinect motion tracking.

• Stack: Unity, Xbox Kinect SDK